Pneumatic valve.



No. 832,038: PATENTED OCT. 2, 1906. H. A. GARLSSON. PNEUMATIC VALVE.

APPLIOATION FILED APR.26.1906.

W/TNESSES v WVENTOH w 1/ dm wvk 3r ATTORNEY.

UNITED STATES PATENT OFFICE.

PNEUMATIC VALVE.

Specification of Letters Patent.

Patented Oct. 2, 1906,

Application filed April 26, 1906- Serial No. 313,897.

To all whom it may concern:

Be it known that I, HAMPUS A. CARLssoN, a subject of the King of Sweden,residing at Bridgeport, county of Fairfield, State of Connecticut, haveinvented a new and useful Pneumatic Valve, of which the following is aspecification.

This invention has for its object to provide a novel pneumatic valveadapted for general use and especially adapted for use uponmachine-tools, as upon drilling, reaming, and tapping machines. It ,hasbeen a serious objection to valves of this character heretofore in usethat they wore out very quickly, it being a common experience that thevalves while new frequently became set and would not operate at all,thus causing serious inconvenience and that after being used for alittle while they leaked, the leakage constantly increasing until itbecame necessary to replace the valve with a new one.

My present invention enables me to produce a valve of this characterwhich shall consist of few parts, be simple and inexpensive to make,costing very much less than any valve for the same purpose heretoforeproduced, and which shall be exceedingly durable, one of my novel valvesoutwearing several of the more expensive valves now in general use.

With these and other objects in view I have devised the novel pneumaticvalve of which the following description, in connection with theaccompanying drawings, is a specification, reference characters beingused to indicate the several parts.

Figure 1 is an elevation of my novel valve complete; Fig. 2, alongitudinal section on the line 2 2 in Fig. 1 looking down; Fig. 3, a

transverse section on the line 3 3 in Fig. 2

looking toward the left; Fig. 4, a transverse section on the line 4 4 inFig. 2 looking to ward the right, the valve being in the open position;Fig. 5, a similar view showing the valve in the closed position; Fig. 6,a longitudinal section of the body and air-strainer detached, the bodyhaving been given a quarter-turn from the position. shown in Fig. 2; andFig. 7 is a rear end view of the head detached.

10 denotes the body; 1.1, the head, which is secured to the body bycorresponding screwthreads on said parts; 12, the air-strainer, which issecured within the body; 13, the valve pro er, and 14 theoperating-sleeve, which osci lates on the body and lies between a flange29 near the outer end of the body and the inner end of the head.

The outer end of the body is provided with an internally-threadedopening 15 for the attachment of the coupling or connection ofa'flexible tube, (not shown,) and the head is provided with a threadedhub 16, having an opening 22 through it, by means of which the valve isattached in place on a machine. The air-strainer consists of a cylinderof fine wire-gauze flattened at its inner end on opposite sides, as at20, and rigidly secured to a disk 17 which is itself secured to the bodyby screws 18.

19 denotes air-openings through the disk outside the flattened sides ofthe strainer, so that air entering through opening 15 will pass throughsaid openings and then through and into the strainer from the outerside. The opposite end of the strainer is shown as provided with astrengthenin gr.ing 21, which lies within the body, but is not securedthereto. Near the inner end of the head is a wall, the inner face ofwhich is ground to form a valve-seat 23 and which is provided withopenings 24 through it for the passage of air. The valve 13 is securedto the operatingsleeve by means of a screw 25, which passes through aslot 26 in the body and engages a flange 27, which extends rearwardlyfrom the valve. The valve is provided with openings 28, which areadapted to register with the corresponding openings 24 in the valveseat,(see Fig. 4, in which the valve is shown in the open position, and Fig.5, in which it is shown in the closed position,) the holes in the valvebeing out of alinement with the holes in the valve-seat.

In practice the valve is preferably made of steel and tempered, and theface thereof is ground to correspond with the ground face of thevalve-seat, so as i to make a perfectly tight joint between the valveand its seat.

The operation will be readily understood from the drawings. Air entersthe body through opening 15, passes through openings 19 in disk 17, andthen through the strainer from the outer side inward, and thence throughthe corresponding openings in the valve and valve-seat when the valve isin the open position, as in Fig. 4. To open or close the valve, it issimply required to oscillate the sleeve sufficiently to move the valvefrom the position shown in Fig. 4 to the position shown in Fig. 5, orvice versa, the oscillation of the sleeve and valve being limited by theengagement of screw 25 with the ends of slot 26 in the body. Owing tothe fact that all air passing through the valve must pass through thestrainer, it is made practically impossible for particles of dust to getbetween the face of the valve and the face of the wall which forms thevalve-seat, so that there is no chance for wear of the parts and nothingto prevent the valve as a whole from lasting an almost unlimited lengthof time.

Having thus described my invention, I claim 1. A valve of the characterdescribed comprising a body, an air-strainer secured thereto, avalve-seat having a ground face with openings through it, a valve havinga correspondingly-ground face and corresponding openings, and anoperating-sleeve to which the valve is connected and by which theopenings in the valve may be placed in or out of alinement with theopenings in the seat.

2. A valve of the character described comprising a body, a cylindricalair gauze-wire strainer having its opposite sides flattened at the innerend, a disk secured within the body to which the flattened end of thestrainer is secured and which is provided with air-open ings outside theflattened sides of the strainer so that air will pass through thestrainer from the outer side inward, a valve-seat having a ground facewith openings through it, a valve having a correspondingly-ground faceand corresponding openings lying between the strainer and the valve-seatand an operating-sleeve to which the valve is connected.

3. An air-strainer comprising a wire-gauze cylinder having its sidesflattened at one end and a disk to which the flattened end of thecylinder is attached and which is provided with air-openings outside theflattened sides of the cylinder, substantially as described, for thepurpose specified.

I 4. An air-strainer comprising a wire-gauze cylinder having at one enda strengtheningring and having its sides flattened at the other end, anda disk to which the flattened end of the cylinder is attached and whichis provided with air-openings outside the flattened sides of thecylinder, substantially as described, for the purpose specified.

5. A valve of the character described comprising a body having a slot26, an airstrainer secured within the body, a valveseat having a groundface with openings through it, a valve having a correspondinglygroundface, corresponding openings, and a rearward lyeXten ding flange, anoperatingsleeve inclosing the body and a screw passing through the slotin the body and engaging the sleeve and the flange of the valve.

6. A valve of the character described comprising a body, an air-strainersecured thereto, a head threaded. to engage one end of the body andhaving a valve-seat with a ground face and openings through it, a valvehaving a correspondingly-ground face and corresponding openings, and anoperating-sleeve inclosing the body to which the valve is rigidlyconnected.

In testimony whereof I afliX my signature in presence of two witnesses.

HAMPUS A. CARLSSON.

Witnesses:

A. M. WoosTER, S. W. ArHEnToN.

